A 3D structured light depth camera and mobile terminal
A technology of depth camera and structured light, applied in image enhancement, instruments, television, etc., can solve the problems of unfavorable miniaturization, limited error improvement ability, small baseline redundancy, etc., and achieves improved depth map quality, unified error level, The effect of good depth map quality
Active Publication Date: 2021-09-21
BEIJING HUAJIE IMI TECH CO LTD
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Problems solved by technology
The 3D depth camera based on structured light illumination is limited by the technical principle, and its depth measurement accuracy deteriorates with the increase of the scene distance.
This affects the confidence and validity of camera measurement data, which severely restricts the performance of 3D structured light measurement technology in various applications
Although the measurement error problem can be improved to a certain extent by adjusting the baseline distance between the structured light transmitter and receiver, the redundancy of baseline adjustment is small, and the ability to improve the error is extremely limited, and high precision corresponds to a wide baseline. Destroy the compactness of the depth camera, which is not conducive to miniaturization
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[0032] The 3D structured light depth camera based on structured light illumination is limited by the technical principle, and its depth measurement accuracy deteriorates with the increase of the scene distance. This affects the confidence and validity of camera measurement data, which severely restricts the performance of 3D structured light measurement technology in various applications. Although the measurement error problem can be improved to a certain extent by adjusting the baseline distance between the structured light transmitter and receiver, the redundancy of baseline adjustment is small, and the ability to improve the error is extremely limited, and high precision corresponds to a wide baseline. Destroying the structural compactness of the depth camera is not conducive to miniaturization. Therefore, this embodiment proposes a more optimized depth camera design that can suppress 3D structured light measurement errors and basically retain the compact structure.
[0033...
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The invention discloses a 3D structured light depth camera and a mobile terminal, and relates to the field of 3D depth measurement. The 3D structured light depth camera proposed by the present invention includes: a transmitting module that projects coded structured light illumination to the scene, takes a spot image of the scene illuminated by structured light at a certain focal length and transmits it to a receiving module of the data processor unit , and a data processor unit for overall cooperative control and data calculation of each optical module of the depth camera, the data processor unit is specifically used to calculate the depth value of the image data captured by the receiving module, according to the change of the depth value The receiving module is controlled to adjust the focal length, and the image data captured by the receiving module after the focus is acquired in a circular manner and the depth value is calculated until a depth image with improved error is obtained.
Description
technical field [0001] The invention relates to the field of 3D depth measurement, in particular to an improved 3D structured light depth camera and a mobile terminal capable of suppressing depth measurement errors of 3D structured light. Background technique [0002] The 3D depth measurement technology can collect the depth coordinate information of the scene target, providing additional data processing freedom for back-end development. With the popularization of mobile terminal devices and intelligent interactive devices, 3D depth measurement technology has increasingly become the core technology of the new generation of human-computer interaction, and has a wide range of applications in industrial inspection, security retail, somatosensory games, mobile payment and biomedicine. Application prospect. [0003] Depth cameras based on speckle structured light technology are currently a widely used 3D depth measurement solution. It uses coded random, pseudo-random or regular...
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IPC IPC(8): G06T7/521H04N5/225H04N13/204
CPCG06T7/521H04N13/204G06T2207/10028G06T2207/10024H04N23/57
Inventor 高乾坤李骊
Owner BEIJING HUAJIE IMI TECH CO LTD